//类实现Contract接口
//public class HouseContract  implements  Contract{
public  class HouseContract extends  AbstractContract{
    //付定金
   // public  void payDeposit(){
        //System.out.println("付定金");
    //}
    //生产商品
    public void produce(){
        System.out.println("生产商品");
    }
    //付尾款
    /*public  void payTail(){
        System.out.println("付尾款");
   */}


